Biomass allocation and gas exchange are affected by light conditions in endangered Cedrela salvadorensis (Meliaceae) seedlings
Fuente:
Redalyc
Saved in:
| Main Author: | |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad de Costa Rica
2016
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1876467705174818816 |
|---|---|
| author | J. Antonio Guzmán Q. |
| author_facet | J. Antonio Guzmán Q. |
| contents | Biomass allocation and gas exchange are affected by light conditions in endangered Cedrela salvadorensis (Meliaceae) seedlings J. Antonio Guzmán Q. Roberto A. Cordero S. Eugenio Corea A. Biología tropical trees light preferences CO 2 response curve light responses curve endangered tree species The determination of favorable light habitat conditions per species and life stage is transcendental, for both ex situ and in situ conservation strategies of endangered forest tree species, and for their utilization as plantation trees. This becomes especially important when planting material is scarce. We studied the multivariate responses in biomass allocation and in gas exchange to light and to CO 2 in Cedrela salvadorensis seedlings, grown under similar light conditions as those this species faces in nature. During a period of 135 days, groups of ten seedlings were put under 75, 45, 15 and 3.5 % of full sun exposure obtained with neutral shade cloth, under nursery conditions. A series of biomass allocation variables and detailed gas exchange parameters (photosynthe - sis response curves to light and to internal carbon concentration) were measured at the end of the growth period in plants of the four treatments. According to the principal component analyses, highest values of gas exchange response were associated with the lower values of biomass allocation traits. These changes can be associated with resource-conservative and resource-acquisitive strategies, where the C. salvadorensis seedlings acclimatize their traits for the exploration and exploitation of light, to high or to dim light environment, respectively. The multivariate analyses also showed that the plants had a high performance at 45 % of light environments. These results suggest that 45 % of light environment was the optimal light habitat of this species at the tested developing stage. Our results have important implications to choose the best natural habitat for a successful establishment of C. salvadorensis . We propose practical considerations for programs of reforestation or reintroduction where this species be involved. 2016 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44946472018 https://www.redalyc.org/journal/449/44946472018/ https://www.redalyc.org/journal/449/44946472018/html/ https://www.redalyc.org/journal/449/44946472018/44946472018.epub https://www.redalyc.org/journal/449/44946472018/movil en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.3 Vol.64 |
| format | Artículo científico |
| id | redalyc_44946472018 |
| institution | Redalyc |
| language | en |
| publishDate | 2016 |
| publisher | Universidad de Costa Rica |
| spellingShingle | Biomass allocation and gas exchange are affected by light conditions in endangered Cedrela salvadorensis (Meliaceae) seedlings J. Antonio Guzmán Q. Biología tropical trees light preferences CO 2 response curve light responses curve endangered tree species Biomass allocation and gas exchange are affected by light conditions in endangered Cedrela salvadorensis (Meliaceae) seedlings J. Antonio Guzmán Q. Roberto A. Cordero S. Eugenio Corea A. Biología tropical trees light preferences CO 2 response curve light responses curve endangered tree species The determination of favorable light habitat conditions per species and life stage is transcendental, for both ex situ and in situ conservation strategies of endangered forest tree species, and for their utilization as plantation trees. This becomes especially important when planting material is scarce. We studied the multivariate responses in biomass allocation and in gas exchange to light and to CO 2 in Cedrela salvadorensis seedlings, grown under similar light conditions as those this species faces in nature. During a period of 135 days, groups of ten seedlings were put under 75, 45, 15 and 3.5 % of full sun exposure obtained with neutral shade cloth, under nursery conditions. A series of biomass allocation variables and detailed gas exchange parameters (photosynthe - sis response curves to light and to internal carbon concentration) were measured at the end of the growth period in plants of the four treatments. According to the principal component analyses, highest values of gas exchange response were associated with the lower values of biomass allocation traits. These changes can be associated with resource-conservative and resource-acquisitive strategies, where the C. salvadorensis seedlings acclimatize their traits for the exploration and exploitation of light, to high or to dim light environment, respectively. The multivariate analyses also showed that the plants had a high performance at 45 % of light environments. These results suggest that 45 % of light environment was the optimal light habitat of this species at the tested developing stage. Our results have important implications to choose the best natural habitat for a successful establishment of C. salvadorensis . We propose practical considerations for programs of reforestation or reintroduction where this species be involved. 2016 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44946472018 https://www.redalyc.org/journal/449/44946472018/ https://www.redalyc.org/journal/449/44946472018/html/ https://www.redalyc.org/journal/449/44946472018/44946472018.epub https://www.redalyc.org/journal/449/44946472018/movil en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.3 Vol.64 |
| title | Biomass allocation and gas exchange are affected by light conditions in endangered Cedrela salvadorensis (Meliaceae) seedlings |
| topic | Biología tropical trees light preferences CO 2 response curve light responses curve endangered tree species |
| url | https://www.redalyc.org/articulo.oa?id=44946472018 https://www.redalyc.org/journal/449/44946472018/ https://www.redalyc.org/journal/449/44946472018/html/ https://www.redalyc.org/journal/449/44946472018/44946472018.epub https://www.redalyc.org/journal/449/44946472018/movil |